Attacking doesn't cause creatures to tap.At the end of each player's turn, tap all untapped creatures that player controls that didn't attack this turn. Angel's Trumpet deals to the player damage equal to the number of creatures tapped this way.

Haste (This creature may attack and T the turn it comes under your control.) Echo (At the beginning of your next upkeep after this permanent comes under your control, sacrifice it unless you pay its mana cost.) When Avalanche Riders comes into play, destroy target land.